Like all the best crime shows, there’s an unsolved murder case, and the three ladies team up to solve it using the power of forensic science.

In our exclusive first look at the show, the main characters come together to pose moodily in front of stunning Scottish landscape.

Front and centre is Molly, who previously excelled in ITV thriller Cheat, as Emma who is forced to face her past as she tries to crack an unsolved case.

The official synopsis reads: ‘When 23-year-old Emma (Windsor) returns to Scotland to take up a new position as a lab assistant at SIFA, she signs up to a MOOC – Massive Open Online Course – which teaches the principles of forensic science. But she soon discovers that the fictitious case study has a strikingly similar and shocking link to her past. As Emma’s sleuthing takes her into darker corners and unpicks more and more secrets, it becomes clear that she should trust no-one. It will be Sarah (Fraser) and Kathy’s (Spence) exacting minds that reward Emma’s faith in the science that has fuelled her imagination and who will ultimately bring a killer to justice.’

Line Of Duty is one of the most watched shows in the past decade (Picture: BBC)

Sans his trademark Steve Arnott beard and waistcoat, Martin went unrecognised as he walked through the set dressed in dark clothes.

The drama has an all-female production team and is written by former Coronation Street star Amelia Bullmore.

Traces airs on Alibi in December.

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